Statistics

What is the median of the data set: 12, 15, 18, 20, 22?

If the mode of the data set 5, 7, 7, 9, 10, 7, 12 is:

The mean of the numbers 3, 6, 9, 12, 15 is:

The marks obtained by 5 students are: 40, 50, 60, 70, 80. What is the range of the data?

The mean of 10 observations is 20. If one observation is 30, what is the mean of remaining 9 observations?

Find the median of the following frequency distribution: Class interval: 10-20, 20-30, 30-40, 40-50 Frequency: 5, 8, 12, 5

If the mean of the data 2, 4, x, 8, 10 is 6, what is the value of x?

In a data set, the mode is 12 and the mean is 15. Which of the following statements is true?

The cumulative frequency just greater than or equal to half the total frequency is used to find:

For the grouped data below, find the mode: Class intervals: 0-10, 10-20, 20-30, 30-40 Frequencies: 5, 12, 20, 8